Plow-lifter.



l W. PRGKNOW.

PLOW LIF'I'EB.4 APPLIOATIvIION FILED SEPT. 3,` 1910.

Patented Apr. 4, 1911.

2 SHEETS-SHEET 2.

,y .Sibley,

UNITED STATS `PAIEN'I OFFICE.,

I WILLIAM PROCKNOW, 0F SHIBLEYWIOWA.

PLOW-Limita.

To all whom it may concern:

Be it known that I, WILLIAM PRooKNoW, a citizen of the. United States, residing at in the county of Osceola and State of Iowa, have invented certain new and use- .ful Improvements in Plow-Lifters; and I /after fully described and then specificallyV y plows do hereby declare the following to be a full, clear, and exact descri tion of the invention, such as'willuenable ot ers skilled in the art to which it appertains'to make anduse` thesame,.reference being had tothe accompanying drawings, and to the letters and'figures of reference marked. thereon, which form a part of this speciication. A

This invent1on relates to new and useful improvements in' apparatus for, lifting plows, etc., by the use of compressed airor steam and it consists of a simple and eicient device of this nature having various details ofconstruction and combinations and arrangements of parts which willv be hereindeined in the appended claim.

I illustrate my invention in 4the accompanying drawings, in which`:-

Figure 1 is a side elevation of my invention. Fig. 2 is a top plan- View Fig. 3 is a detail sectional view on line 3-3 of Fig. 1. Fig., 4 is a sectional view on line Fig. 1, and Fig. 5 is a sectional view on line 5-5 of Fig. 1. y 4 Reference now being had to the details of the drawings by letter, A designates a frame which is adapted to be attached to the engine for drawing the apparatus, connection being made by means of the straps A. Said frame has a crossbar'A2 thereon to which the'plow beams lB are pivotally mounted, having fixed thereto. RisingA from 'the frame are the standards B3, braced by the beams B4, and a pulley C is journaled at the upper ends of each air. of standards and over which a cable fastened at one end to the plow beam and its other end to the stem E of a movable within a cylinder F, each of which is held by means of straps F to a beam B2. Said cylinder, there being one for each plow beam, is provided with an exhaust port F2 to prevent a partial vacuum forming in the the piston is moved in` one direction. v L

A pipe, designated by letter H, leads to and is adapted to communicate with asupply main, air..` or steam, and a branching pipe I' leads from the pipe H and affords means Specification of Letters Patent.. i Application tiled September 3, 1910. Serial No. 580,365.`

4for securely holdin the valve in place.

.raised by the apparatus.

passes which is p piston E', either the pipe J or J -and drawing upon the the handle Q2 is given a Patented Apnfi, 1911.

for exhausting lair or steam to the atmosphere. A valve casing K communicates with the pipes H andI and a three-way valve N 1s positioned in said casing and affords means whereby the steam-or air maybe allowed to ass through ,the casing and pipe `YK and a so through thefunion K2 to the pipe O. Said valve also allows the air or steam to exhaust from the pipe K, through the pipe I to the atmosphere by turning it in a certain position. A boxing, designated by letter Q, communicates with the pipe O and has pivotally mounted therein a hollow stem Q to which a crank handle Q2 is fixed. Said stem has a duct Q* leadin therethrough and\r:ommunicatesl with `a va ve P having' a duct P leadin therethrough. Said valve P is mounte in an air-tight casing R. Said valve has a short stem 2 projecting through an aperture in the casing R and a` nut Ps is mounted upon the end of said. stem P2 and serves as means Said valve P is provide with a flange P* which fits against the marginal edge of the casing in which the valve is mounted. Said casing R has apertures in its circumference,v one of which communicates with the 'pipe J, which leads to and communicates with one end of the'l cylinder F, while a second pipe J also communicates with the casing R and with one end of the other cylinder F, it` being.,

understood that there wlll be as many pipes J-a d Jas there are vgang'plows to be The operation of my invention Iwill be readily understood and is as follows:- When it is desired to cause `one or another of the gang plows to be raised, the steam or air is allowed to pass from thepipe H to the boxing Q, by turning the valve N into proper position to'close'exit ipe I. By turning Q* may be thrown into communication with accordingly as it may be desired to cause one plow or the other to be raised. In the drawings, I have shown the duct as communicating with the pipe J which -will cause the pressure to be applic( to the piston E within the cylinder F, thereby driving the piston within the cylinder cable C connected therein, thereby causing be raised. In the event of it'being desired to cause the other plow beam to lbe raised,

' partial rotary from the valve H to the the handle Q2, the duct the plow fra-me 'tol movement so that the duct therein will register with the duct in the pipe J, which will Vcause the other plow beam to be raised.

tendency to form aivacuum within the cyl-- inders as the piston moves to the opposite end of the cylinder will 'be avoided.

It will be understood from the foregoing that any number of cylinders' may be employed with pistons adapted to 'actuate a plow beam'by the mechanism shown.

What I claim to be new is An apparatus for lifting plows comprising a frame, a plow having a beam pivoted thereto, saidl frame provided with inclined portions, a cylinder fastened to the latter, a piston in said cylinder, a pulley .upon the frame, a cord fastened at one end to thepiston rod, passingabout said pulley and fastened to the plow beam, a casing having openings in its topand bottom of different diameters and beveled edges to each opening, a pipe communicating with an opening --inthe wall of saidfcasing, a'istem having a longitudinal passageway extending therethrough and its upper end being conical shaped and having bearings against the beveled mar inal edges of the openings in the casing, a andle fixed to said stem, the upper end of said passagewayopening through the circumference of the conical shaped portion,

the lower end of the stem having'a cylindrical outlined portion with a flange about its l,upper edge, the lower end of the passagewayl opening through the circumference of saidl lower end of the stem is mounted, and means for supplying the fluid to said casings.

In testimony whereof I hereunto aiiix my lsignature in the presence of two witnesses.

WILLIAM PROCKN OW.

Witnesses:

THEODORE H. GRAVES, WILLIAM IsAcK. 

